1 kW Power Transmission Using Wireless Acoustic-Electric Feedthrough (WAEF)

Sherrit, Stewart; Bao, Xiaoqi; Bădescu, Mircea; Aldrich, Jack; Bar‐Cohen, Yoseph; Biederman, W.

doi:10.1061/40988(323)120

Cited by 10 publications

(24 citation statements)

References 3 publications

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“…NASA developed two prototypes, successfully transferring 100W for 25 seconds, and 1kW for 5 seconds through titanium with a thickness of 3.4mm and 5mm respectively, achieving an efficiency of 84% and 88% [5,6]. The limited operation duration was due to heat buildup of the transducers as well as the medium.…”

Section: A State-of-the-art Aet Systemsmentioning

confidence: 98%

“…An efficient piezoelectric transducer driving circuit and rectifying circuit was also proposed for low power applications in [7]. A majority of the prior arts [3,5,6] have used a signal generator cascaded to a linear power amplifier to drive the transducer at high power, which is inefficient and inappropriate for practical applications. This paper investigates the underlying factors of an AET system and presents the results from an experimental AET system for transferring power through conductive media.…”

Section: A State-of-the-art Aet Systemsmentioning

confidence: 99%

“…The simplest setup to meet the above requirements would be using a power signal generator or linear amplifiers [5,6]. However, this solution is inefficient for a practical application.…”

Section: ) Electronic Circuit Configurationmentioning

confidence: 99%

“…vibrations), a high-energy acoustic wave would correspond to violent vibrations. This may potentially generate excessive heat and detriment the performance of the system [6]. A large solid medium is desirable for high power applications because heat would dissipate more effectively.…”

Section: B Wave Propagationmentioning

confidence: 99%

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Wireless electric power transfer based on Acoustic Energy through conductive media

Leung

Willis

2014

2014 9th IEEE Conference on Industrial Electronics and Applications

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This paper presents the development of a new wireless electric power transfer technique named Acoustic Energy Transfer (AET). Sound waves are utilized to transfer energy through metal barriers without direct-wired connections. Factors influencing the performance of AET are investigated, and a prototype AET system is developed. The prototype demonstrated that 62W of power can be transferred across a 70mm thick aluminum block at an efficiency of 74% when the system operates at the resonant frequency of the transducer (28kHz). These experimental results are very promising for practical applications where power transfer is needed across metal barriers. Suggestions for further development on AET systems are also presented.

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Section: A State-of-the-art Aet Systemsmentioning

confidence: 98%

Section: A State-of-the-art Aet Systemsmentioning

confidence: 99%

“…The simplest setup to meet the above requirements would be using a power signal generator or linear amplifiers [5,6]. However, this solution is inefficient for a practical application.…”

Section: ) Electronic Circuit Configurationmentioning

confidence: 99%

Section: B Wave Propagationmentioning

confidence: 99%

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Wireless electric power transfer based on Acoustic Energy through conductive media

Leung

Willis

2014

2014 9th IEEE Conference on Industrial Electronics and Applications

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“…There have been a wide variety of methods for modeling and characterizing the channel such as analytical methods based on wave propagation equation and piezoelectric theory [1][2][3][4][5][6][7], equivalent circuit methods [8][9][10][11][12][13][14][15][16][17], finite element modeling (FEM) methods [10,11,13,18,19], and the two-port network model based methods [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

The Modeling Framework for Through‐Metal‐Wall Ultrasonic Power Transmission Channels Based on Piezoelectric Transducers

Yang

Hou

Tian

2019

Mathematical Problems in Engineering

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The investigation of the wireless ultrasonic energy and signal transmission through metal barrier into hermitical metallic structures has become an interesting field of research. The most often constructed acoustic-electric ultrasonic power transmission channels are based on piezoelectric transducers. Effective modeling methods with accuracy are essential to the performance prediction and optimal design of such channels. Up to now, there exists a variety of modeling methods including theoretical analytical method, equivalent circuit method, two-port network method, and finite element modeling method. However there is a little chaos about how to choose an appropriate modeling method among them. There is also a lack of a systematic modeling framework presented involving principles, advantages, disadvantages, and constraint conditions of these methods. In this review, a common modeling framework for through-metal-wall acoustic-electric channels based on piezoelectric transducers is presented. The principles of the major modeling methods are introduced and the adoptability and constraints of each method are discussed. For each modeling method, simulation and or experimental results are also presented to validate the accuracy of the corresponding modeling method.

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Modeling and analysis of ultrasonic power transfer system with tightly coupled solid medium

Leung

2016

Wirel Pow Transfer

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Ultrasonic Power Transfer (UPT) has been developed as an alternative solution for achieving wireless power transfer. This paper proposes a new model describing UPT systems with tightly coupled piezoelectric transducers firmly bound to solid media. The model is derived from the short-circuit admittance of the system measured from the primary transducer. The mechanical characteristics of the system are modeled with parallel LCR branches, which reveal the fundamental relationships between the power transfer characteristics of the tightly coupled UPT system and system parameters. The loading conditions for achieving the maximum power transfer are identified, and the operating frequencies corresponding to the peak power transfer points for variable loads are determined. A practical UPT system is built with two 28 kHz Langevin-type piezoelectric transducers connected to a 5 mm-thick aluminum plate, and the practical results have verified the accuracy of the proposed model.

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1 kW Power Transmission Using Wireless Acoustic-Electric Feedthrough (WAEF)

Cited by 10 publications

References 3 publications

Wireless electric power transfer based on Acoustic Energy through conductive media

Wireless electric power transfer based on Acoustic Energy through conductive media

The Modeling Framework for Through‐Metal‐Wall Ultrasonic Power Transmission Channels Based on Piezoelectric Transducers

Modeling and analysis of ultrasonic power transfer system with tightly coupled solid medium

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